Alias

About the series

Contains story spoilers.

Created by J.J. Abrams, Alias began on ABC in 2001 with the feature-length pilot “Truth Be Told” and ran for five seasons. Jennifer Garner plays Sydney Bristow, whose professional disguises are one expression of a larger problem: every institution and relationship asks her to conceal a different part of herself. Michael Vartan is CIA officer Michael Vaughn, Victor Garber is Sydney’s father Jack, and Ron Rifkin is Arvin Sloane, her powerful SD-6 supervisor. The ensemble also includes Carl Lumbly as Marcus Dixon, Kevin Weisman as technical specialist Marshall Flinkman, Bradley Cooper as journalist Will Tippin and Lena Olin as Irina Derevko.

Sydney enters the story believing SD-6 is a covert branch of the CIA. After she tells her fiancé Danny Hecht about her work, he is murdered the next day; Jack later says SD-6, not the CIA, killed him. Jack then tells Sydney that SD-6 is actually part of the hostile Alliance of Twelve, and that he too serves as a CIA double agent. Sydney joins the real CIA under Vaughn while continuing to report to SD-6, so each assignment has two audiences and incompatible purposes. Meanwhile, Will investigates Danny’s death and slowly approaches the secret Sydney must keep from her friends. Her cover depends on controlling what other people can know, while her own certainty about her father and employer keeps shifting.

That conflict becomes literal when ex-agent McKenas Cole leads an armed team into SD-6 headquarters to punish Sloane for leaving him in Russian hands. Sydney and Jack arrive during the takeover and are trapped inside as gas incapacitates the office staff. Cole wants a device from Sloane’s vault; opening it incorrectly could destroy the building with everyone inside. Jack monitors the guards while Sydney crawls through ventilation ducts to Marshall’s office for a descrambler. When she cannot retrieve it with a magnet, Jack signals Marshall and Dixon through a security camera, creating the distraction that lets Sydney enter the room and escape with the device. The siege forces father and daughter to protect the organization they are secretly trying to undermine.

Family history also moves to the front of the spy conflict. The second-season opening resumes with Sydney held in Taipei, where the figure she recognizes as her long-presumed-dead mother, Irina Derevko, shoots her in the shoulder and escapes. Sydney returns to the CIA and searches the wrecked laboratory for Vaughn, then has to resume SD-6 duties while Jack manages Sloane’s suspicions about her loyalty. After Sloane’s wife Emily is buried, Jack tells Sydney that Irina has surrendered at CIA headquarters. The turn puts Sydney in a new bind: custody gives her access to her mother, but it does not settle whether Irina is cooperating, manipulating the agency or pursuing her own goals. Jack’s double life and Irina’s past make family trust inseparable from operational risk.

A mission to save Vaughn makes that mistrust immediate. After exposure to a lethal virus, he has only days, and Irina tells Sydney that the antidote is held at a former nuclear testing site in Paldiski. Sydney enters in a protective suit to download the serum-generator information, but Sark locks down the compound and activates sprinklers that will dissolve her suit. He offers a bargain: she will help him reach Sloane, and he will let her keep the antidote. Sydney later disguises herself to inject Sloane and deliver him to Sark; Sark releases the code that allows the antidote to be made. Vaughn survives, but Sark revives Sloane and returns him to SD-6 as an apparent ally. Sydney’s rescue therefore strengthens the man she was trying to neutralize and changes the balance inside the organization.

The double-agent arrangement changes when Geiger replaces the missing Sloane and discovers keystrokes suggesting Jack and Sydney are working for the CIA. Jack is captured, and Sydney turns to Dixon, who still believes SD-6 is an American agency. She explains the truth and directs him to a hidden Alliance file. Dixon checks the evidence himself, then sends the cell code to the CIA; the match lets the agency coordinate raids on Alliance facilities. During the assault on SD-6, Sydney reaches the interrogation room and shoots Geiger before he can continue torturing Jack. Dixon and Marshall are taken into custody with the other staff, and the CIA reports control of the Alliance sites. The operation dismantles Sydney’s original cover structure, while Sloane’s apparent absence conceals a further plan.

The series also builds its espionage plot around Milo Rambaldi, a Renaissance-era figure whose writings and devices seem to describe later events. In the second-season finale, Sydney and Vaughn trace Jack’s capture to Sloane, who has assembled an artifact called the Telling. Irina helps Sydney find Sark, who gives up Sloane’s location in Mexico City, but the rescue does not recover the device. On a rooftop, Irina tells Sydney that Sloane believes he has been chosen to fulfill Rambaldi’s work and claims that the prophecy points to Sydney instead. She escapes by dropping from the building on a rope, leaving Sydney without an answer about her mother’s intentions. Rambaldi’s predictions act as both evidence and temptation: Sloane treats them as a purpose, while Sydney must decide what the clues actually establish.

The consequences of that mythology widen after Sydney’s disappearance. In “Full Disclosure,” a CIA officer explains that a body bearing Sydney’s DNA was found in her burned apartment and recounts how the Covenant abducted her, used a substitute corpse and trained her under the identity Julia Thorne. The episode reveals that Sydney pretended to be brainwashed, drawing on earlier conditioning, and later chose to have her memories removed so the Rambaldi cube would stay hidden. The Covenant’s belief that her eggs could be combined with Rambaldi’s DNA turns her body into another contested intelligence asset. That revelation reinterprets the gap in her life without resolving every question about the people or organizations involved. Alias repeatedly makes identity both a practical disguise and something other characters try to claim, edit or control.